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Re: CULT:potting irises

  • Subject: Re: CULT:potting irises
  • From: "Jan Clark" <janclarx@hotmail.com>
  • Date: Wed, 03 Feb 1999 18:13:28 PST

From: "Jan Clark" <janclarx@hotmail.com>

Thanks Glenn, for a very interesting e-mail on potting of new irises. I 
haven't planted a rz direct into the garden since our discussions last 
year. I found the potting method so successful. It solves the problem of 
'rocking' rhizomes not establishing roots, and also allows me to prepare 
my new beds when I want to, rather than having to rush, in the heat of 
summer, to get beds ready for new rz.s 
I put all my pots together in a sort of circle, so I can put the 
sprinkler on for a while, and go back inside. I use a mixture which is 
1/2 and 1/2 compost and sharp sand.
Up until my last batch of rz's I had been reluctant to shaving the 
roots. The rz's that came from Graeme Grosvenor were quite dry, and 
their roots were shrivelled. I have had problems establishing these 
previously, so I trimmed off all the roots, soaked the rz's for 2 days 
in a weak seaweed fertiliser solution, then planted them. They are easy 
to push into the soil this way.
What really amazed me was the 1/4 inch of new root growth that occurred 
on most of the 11 rz's during the 2 days they were in the seeweed 
I wait until I see signs of roots protruding from the base of the pots 
before I plant them in the garden.
I think the 'gallon' pots you are talking about would be 8 to 10" 
diameter. A 6 inch pot certainly wouldn't have the volume of a gallon. 
(1 gallon = 8 pints). I have been using 6" pots for TB's and SDB's. 
Occassionally I use  4" pot for my SDB's
Cheers, Jan Clark

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